<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .menu-one{
            height: 40px;
            width: 200px;
            background-color: yellow;
            /*border-bottom: 1px solid red;*/

        }
        .memu-two .c2{
            height: 20px;
            width: 200px;
            background-color: green;

        }
        .hide{
            display: none;
        }
    </style>

</head>
<body>

<a href="javascript:void (0);">asdf</a>
<a href="#">asdf2</a>

<div class="c1">
    <div class="menu-one">菜单一</div>
    <div class="memu-two hide">
        <div class="c2">红烧茄子</div>
        <div class="c2">红烧肉</div>
        <div class="c2">酱肘子</div>

    </div>
    <div class="menu-one">菜单二</div>
    <div class="memu-two hide">
        <div class="c2">钢管抽白菜</div>
        <div class="c2">干煸豆角</div>
        <div class="c2">油炸井盖</div>

    </div>
    <div class="menu-one">菜单三</div>
    <div class="memu-two hide">
        <div class="c2">麻辣小龙虾</div>
        <div class="c2">水煮电线</div>
        <div class="c2">麻辣牛欢喜</div>

    </div>

</div>



</body>
<script src="jquery.js"></script>
<script>

    $('.menu-one').click(function () {
        // this // DOM对象
        $(this).next().toggleClass('hide').siblings('.memu-two').addClass('hide');

    })

</script>

</html>